Company lists · Data refreshed September 2026
Top 25 L-1 visa law firms based in the United Kingdom
RevenueBase identified 302 l-1 visa law firms headquartered in the United Kingdom as of September 2026 and tracks 2,174 professional contacts across them, including 886 with verified work emails. London is the largest hub.
This list covers l-1 visa law firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest l-1 visa law firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 126 contacts → | ||||
Partial evidence “At Immigration Advice Service, we are more than just immigration solicitors; we are your dedicated partners in navigating the intricate world of immigration law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 70 contacts → | ||||
Partial evidence “With Over 26 Years Of Experience in Global Immigration Law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 63 contacts → | ||||
Indirect evidence “UK and US Immigration lawyers with offices in London and New York, regarded as a “stellar” boutique immigration firm with a powerful transatlantic capability.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 62 contacts → | ||||
Indirect evidence “Our specialist immigration solicitors and employment solicitors based in central London focus on supporting the needs of businesses and individuals, both nationally and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 31 contacts → | ||||
Partial evidence “We are Paragon Law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 30 contacts → | ||||
Indirect evidence “At A Y&J Solicitors, our mission is to help individuals and businesses navigate complex UK immigration processes with trust, care, and excellence.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 contacts → | ||||
Indirect evidence “WorkPermitCloud Limited is a business immigration advisory firm based in London, UK.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 28 contacts → | ||||
Partial evidence “Welcome to Newfields Law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 27 contacts → | ||||
Indirect evidence “Legend Solicitors is a legal firm run by Mr Aravind Sreevalsalan based in London.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 25 contacts → | ||||
Indirect evidence “We provide Employment and Regulatory Solutions at Work.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 24 contacts → | ||||
Partial evidence “Public Law 2.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 22 contacts → | ||||
Partial evidence “OTB Legal is a nationally recognised specialist UK immigration law firm, known for delivering expert legal advice with a refreshingly modern and client-focused approach.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Partial evidence “We are a leading law firm specialising in Corporate Immigration, passionately dedicated to guiding businesses through the intricate landscape of UK immigration laws.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 22 contacts → | ||||
Indirect evidence “At Samartin & Friends, we specialise in helping people and businesses navigate the often complex process of U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 22 contacts → | ||||
Partial evidence “The firm Established in 2014, OTS Solicitors has rapidly become recognised as one of the UK's leading immigration and family law firms.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 22 contacts → | ||||
Partial evidence “Aston Brooke Solicitors is a specialist law firm providing end-to-end legal support for care providers, healthcare businesses, and employers across the UK.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 16 contacts → | ||||
Strong evidence “Leading UK immigration firm Vanessa Ganguin Immigration Law advises both businesses and individuals on swift affordable UK visa solutions, always with a friendly approach.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 16 contacts → | ||||
Partial evidence “We can help you, whether you’re wanting to apply for a UK visa, apply for an extension, or for asylum.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “Hudson McKenzie’s Business Immigration Group implements comprehensive immigration solutions for corporate and government clients worldwide.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Partial evidence “Welcome to NARA Solicitors, a modern law firm with a commitment to delivering exceptional legal services, operating under the regulation of the Solicitors Regulation Authority.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Partial evidence “M-R Solicitors LLP is one of the top UK law firms providing services to large portfolio of clients in private and business sector from last 14 years.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 contacts → | ||||
Partial evidence “RakLAW Solicitors is a full-service law firm based in London, United Kingdom.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 14 contacts → | ||||
Partial evidence “We are highly motivated and committed to the field of immigration law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 13 contacts → | ||||
Strong evidence “Flynn Hodkinson is a boutique US visa and nationality law practice based in the UK and Ireland.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 12 contacts → | ||||
Partial evidence “Andrew Williams Solicitors is a Leeds-based, SRA-regulated law firm with 34+ years of combined immigration law experience.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: l-1 visa law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names l-1 visa law firms.
- Partial evidence
- Its own public description names part of l-1 visa law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name l-1 visa law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 302 l-1 visa law firms based in the United Kingdom
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L-1 visa law firms based in the United Kingdom at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 302 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among l-1 visa law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “l-1 visa law firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names l-1 visa law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among l-1 visa law firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 886 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
L-1 visa law firms by metro
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names l-1 visa law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many l-1 visa law firms are there based in the United Kingdom?
RevenueBase identified 302 l-1 visa law firms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Immigration Advice Service, headquartered in Oldham, tops this list with the largest team on record.
Which city has the most l-1 visa law firms?
London leads with 159 headquartered companies, followed by Birmingham (16) and Manchester (11).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 886 verified decision-maker contacts tracked across these 302 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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